Marissa Mayer has been making lots of changes at Yahoo, from buying up smaller companies, like blogging platform Tumblr, to changing the company's telecommuting policy. But for a modern tech company, there are few things more important than successful branding. Every day this month, Yahoo will be using a new logo on its home page, with a big reveal of its official logo next month. And, another newbie entered the already crowded pool of smartphone options. The LG G2 flagship phone has some unique features. The most intriguing ones involve sensors that tell the phone what you're doing and help you do it.